Standardize usage of virtual/override/final in net/

net/http/http_auth_handler_factory_unittest.cc

Index: net/http/http_auth_handler_factory_unittest.cc
diff --git a/net/http/http_auth_handler_factory_unittest.cc b/net/http/http_auth_handler_factory_unittest.cc
index 9860623314915513aefc9b98a9b61e914d5000db..2aa7958800c18eaf32cdf3e7f2060909577445aa 100644
--- a/net/http/http_auth_handler_factory_unittest.cc
+++ b/net/http/http_auth_handler_factory_unittest.cc
@@ -19,15 +19,15 @@ class MockHttpAuthHandlerFactory : public HttpAuthHandlerFactory {
  public:
   explicit MockHttpAuthHandlerFactory(int return_code) :
       return_code_(return_code) {}
-  virtual ~MockHttpAuthHandlerFactory() {}
-
-  virtual int CreateAuthHandler(HttpAuthChallengeTokenizer* challenge,
-                                HttpAuth::Target target,
-                                const GURL& origin,
-                                CreateReason reason,
-                                int nonce_count,
-                                const BoundNetLog& net_log,
-                                scoped_ptr<HttpAuthHandler>* handler) override {
+  ~MockHttpAuthHandlerFactory() override {}
+
+  int CreateAuthHandler(HttpAuthChallengeTokenizer* challenge,
+                        HttpAuth::Target target,
+                        const GURL& origin,
+                        CreateReason reason,
+                        int nonce_count,
+                        const BoundNetLog& net_log,
+                        scoped_ptr<HttpAuthHandler>* handler) override {
     handler->reset();
     return return_code_;
   }